# CS402 FINAL TERM PAST PAPERS MEGA FILES

## CS402 FINAL TERM PAST PAPERS MEGA FILES

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### CS402: Theory of Automata Solved Past Papers

#### Course Outline

Languages, Kleen Closure, Recursive Definitions, Regular Expressions, Finite and Infinite languages, Regular Languages, NonRegular Languages, Finite Automata with output, Finite Automata and their languages, Transition Graphs, Nondeterminism, NonRegular Languages, The Pumping Lemma, Context Free Grammars, Tree, Ambiguity, Pushdown Automata, Decidability.

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### CS402: Theory of Automata

Automata theory is a branch of computer science and mathematical theory. It is a study of invisible machines and computational problems that can be solved using these machines. An invisible machine is called an automata. The main motivation for developing automata theory was to develop methods to explain and analyze the dynamic behavior of different systems. Automata is a type of machine that takes a unit of character as input and this input exceeds a limited number of regions and can enter the final state.

Automata theory is closely related to systematic language theory. In this context, automata is used as a limited presentation for non-stop official languages. Automata is often classified as the official languages ​​they can identify, as in the Chomsky category, which describes the settlement relationship between the major automata categories. Automata plays a major role in arithmetic theory, compiler design, operational ingenuity, analysis and validation.

The theory of invisible automata was developed in the mid-20th century regarding finite automata. Automata theory was originally considered to be a branch of mathematical system theory, studying the behavior of systems of different parameters. The first function in automata theory differs from previous system functions by using invisible algebra to describe information systems instead of divisive calculations to describe material systems. The theory of finite-state transducer was developed under different names by different research communities. The real concept of Turing machines is also incorporated into the training and innovation methods of the automotive circuit, such as pushdown automata.

#### Informal Definition

The automaton starts when given a sequence of inputs with different (individual) steps or steps. Automaton processes one input in a set of symbols or letters, called the input alphabet. The symbols acquired by automaton as an input into any step are a sequence of symbols called names.

The automaton has a set of conditions. Every time an automaton operates, the automaton is in one of its regions. When an automaton receives a new input it moves to another state (or changes) based on the change of the previous replacement function and the current input mark as parameters. At the same time, another function called the output function produces signals from the outgoing characters, and depending on the previous state and the current input signal. The automaton reads the input word symbols and switches between regions until the word is read altogether, if measured in length, when the automaton stops. The state in which an automaton stands is called the final state.

In order to investigate a possible sequence of input / output / output on an automatic machine using official language theory, the machine may be provided with the original setting and set of reception conditions. Then, depending on the run from the initial mode to the receiving state, the automaton can be said to accept or reject the input sequence. The set of all the words accepted by an automaton is called an automaton-recognized language. A typical example of an electronic voice detector is an electronic lock that accepts or prohibits attempts to enter valid code.